Transom-lifter.



PATENTED AUG. 22,1905. H. OSBORNE.

TRANSOM LIFTER.

APPLICATION FILED MAY 17, 1904.

2 SHEETBSHEET l N0. 79?,780 v PATENTED, AUG. 22, 1905. H. OSBORNE.

TRANSOM LIFTER.

APPLICATION FILED MAY 17, 190a.

PTENT OFFICE.

HEMAN OSBORNE, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO THE OSBORNE BLIND ADJUSTER COMPANY, OF SPRINGFIELD, MASSAOHU SETTS, A CORPORATION OF MAINE.

TRANSOM-"LIFTER,

Specification of Letters Patent.

Patented Aug. 22, 1905.

Application filed May 1'7, 1904:. Serial No. 208,405.

To all whom it may concern.-

Be it known that I, HEMAN Osnonnn, a citizen of the United States of America, and a resident of Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Transom-Lifters, of which the following is a full, clear, and exact description.

This invention relates to improvements in operating mechanism or lifters for transoms, and is an improvement over and advance beyond the transom-operating devices shown and described in Letters Patent of the United States granted to me, dated March 24, 1903, No. 723,482.

The invention relates to details of construction and certain particular combinations and arrangements of parts whereby the transomeperating device is certain, easy, and quick in action, particularly satisfactory by reason of the avoidance or absence of any lost motion or rattling in the operative parts and the transom therewith connected, is adjustable or adaptable to ordinary transoms in any situation and having any extent of swinging opening and closingmovements, is easily assembled, and has the particular operating parts thereof compactly disposed within a metallic shell or casing whereby such parts are protected from dirt, dust, and moisture, and the whole clevice is attractive, sightly, and acceptable for use in fine residences, hotels, and other buildings.

The invention consists in the improvements constituted by the parts in their relations shown in the accompanying drawings and set forth in the claims.

In the drawings, Figure 1 is substantially a side elevation of the improved device shown in its operating action with a transom, the inclosing shell or casing being represented in vertical section. Fig. 2 is a front elevation of the housed-in portions of the operating device, the casing or housing being shown as in section. Fig. 3 is a perspective view of the complete device applied in connection with the transom. Fig. 4: is a perspective view of matching castings which constitute the support and bearings for the inclosed movable operating parts of the transomlifter. Fig. 5 is a perspective view of the thin metallic shell or housing. Fig. 6 is a perspective view showing the parts constituting a means of adjustment of the transomoperating lever, so that the swinging move" ment may be between any required points corresponding to the location and capability for swinging of the transom. Fig. 7 is a perspective view of one of a duplicated set of springs applied in a novel manner in the device for preventing backlash or lost motion between the worm and worm-wheel of the device.

Similar characters of reference indicate cor responding parts in all of the views.

The transom-lifter embodies in cooperative combination a shaft A, having a worm a, a shaft B, arranged right angular-1y and suit ably adjacent the worm-shaft and having thereon a worm-wheel 6, both shafts being journaled in a fixture or bracket therefor, the worm-shaft having means for conveniently rotating it operable exteriorly of the inclosed or housed-in devices, and the worm-wheel shaft has a rigidly-aiiixed and radiallyextending lever D operatively engaged with the hinged transom E, spring appliances being provided for reacting against the worm-wheel shaft in a direction the reverse of the force which is brought thereupon through the me dium of the operating-lever by the weight of the opened or partially-opened transom.

I will now proceed to describe the device precisely as shown, and point out the specific peculiarities and details of construction.

The supporting fixture or bracket F con sists of a back orbase (Z, having an integral arch or bridge shaped bracket-section f and the separable matching arch or bridge shaped bracket-section f, the said back (Z and the span portion of the one bracket-section f, having journal-holes 10 10 in alinement and. perpendicular to the back, constituting bearings for the end journals (1, of the worm-shaft, and the integral and separable bracket-sections and f have through the opposite leg members of each and in a line at right angles to the axis-line of the aforementioned holes 10 10 the journal-holes 12 12, which form the bearings in which the worm-wheel shaft B is supported for its partial rotary movement. The bracket-sections are formed so as to match together, as represented in Fig. 2, they being, however, recessed, as represented at 13, for the accommodation of the worm-wheel, and such sections are clamped together by the confining-screws 1d 14:, the screw-holes therefor being represented at 15 15 in Fig. 4. The in termediate or spanned portions of the archshaped bracket-sections, furthermore, have the perforations 16 16 near their outer edges. The worm-wheel shaft B has its end, as represented in Fig. 6, formed neck down, whereby the shoulder 18 is produced, and next thereto it has a short circular portion 19, while its extremity 20 is of squared or equivalent shape, the so-formed end of the shaft having an axial screw-tapped hole 22 therein.

The transom-operating lever D has at its lower end a circular hole 23 therethrough, which fits about the circular portion 19 of the shaft extremity and facewise against the shoulder 18, and a short arm G is by the square aperture 25 therein non-rotatably engaged with the squared end portion 20 of the shaft and has near its upper end the arc-shaped slot 26 concentric with the shaft-axis.

The headed screw 28 holds the parts G and D from disengagement with the end of the shaft, and a screw 29, the shank of which passes through the aforementioned arc-sh aped slot and with a thread engagement into the tapped hole 30 in the lever D, forms a means of detachable connection between the arm G, which is always non-rotatable in relation to the shaft, and the transom-operating lever D, which, as here perceived, has a capability of adjustment whereby it may extend in different radial lines from the worm-wheel shaft, the rangeofthe adjustment being limited by the length of the slot 26.

g 9 represent a pair of coil-springs, the coils thereof encircling the worm-wheel shaft at opposite sides of the worm-wheel, and an extremity 32 of each thereof is engaged with the bracket by having its angularly-formed end 33 entered into the aforementioned perforation l6, and the coil-springs have their other and free end portions formed with eyes 34:, arranged in opposition, as represented in Fig. 2, and a bar or pin it engages through said eyes, whereby it becomes supported by the eye-formed extremities of the two springs, and such bar intermediately of its length engages between two of the teeth of the wormwheel, the spring-coils being understood as under considerable tension, so that they, through the medium of the connecting-bar h, exert a tendency to force the worm, its sh aft, and the transom-operating lever in a direction opposed to the force brought against the lever by the weight of the transom in its open or partially-open position, it of course being remembered that the parts can only be moved by imparting a rotary movement to the wormshaft.

The worm in the present instance is made with a double worm-thread, the parallel double threads being of wide pitch, while the threads are arranged comparatively closely together, so that the worm-thread engaging in comparatively fine teeth of the wormwheel, having the wide pitch rendered possible by the plurality of the threads, enables on a comparative slight degree of rotative movement. of the worm a considerable and rapid movement of the worm-wheel and transom-operating lever and with the possibility of but the slightest imaginable lash or lost motion in the worm-gearing, and the provision of the coil-springs applied as shown and reactive for the greatest possible leverage at the toothed edge of the worm-wheel renders the operating mechanism sensitive in action, overcoming the tendency of binding or hard motion which might be imposed by the pressure induced by the weight of the transom.

The end of the transom-operating lever .D is angularly turned, as shown at in Figs. 1, 2, and3, and is formed with a neck 42 and an end head 43, the necked portion 42 being engaged through the elongated slot 44: of the angular plate which is screwed at the end of the transom, the engagement being such that changes in the angularity of the transom and the lever will be compensated for by the capability of sliding movement relatively between the parts D and j, the lever, nevertheless, always exerting a leverage action against the hinged transom.

The parts of the mechanism which are directly supported by and intimately related to the bracket are inclosed within the casing L,

which, as shown, is of a general rectangular form, although it may be of other design having fitness to the purpose, said casing being made in the form of a thin sheet-metal flange 50, which is adapted to set against the marginal portions of the back (Z of the bracket and also to overlap the edges of the bracketback, and this casing has the side hole 52,

through which the extremity of the wormwheel shaft may protrude, and it also has the two separated holes 53 53 through its under side for the accommodation of the extremities of the chain M, which by an intermediate part engages around the aforementioned sprocketwheel G on the worm-shaft, rings or handles 55 55 being provided on the lower ends of the chain extremities. The supporting structure may have depending tubes 56 56 fitted into depending hubs 57 of the bracket-casting for incasing the greater portions of the lengths of the chain extremities, as shown in Fig. 3,

this provision being optional.

The nicety of action and generally satisfactory and reliable operativeness of the transomlifter is acquired by the improvements made in respect of small features and matters in different parts of the mechanism and as has been with considerable particularity hereinabove set forth.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a transom-lifter, in combination, the shaft having a worm, and the right-angularlyarranged shaft having the worm-wheel and provided at its end with a lever for operative engagement with the transom, fixed brackets in which the worm and worm-wheel shafts are journaled, means for imparting rotative movevewso 3 which the worm and worm-wheel shafts are.

journaled, means for turning the Worm, coiled springs encircling the worm-wheel shaft at opposite sides of the worm-wheel, having extremities of each thereof engaged with the bracket, and having their other and free end portions formed with eyes, arranged in opposition, and a bar engaging through said eyes and intermediately with the toothed edge of the Worm-Wheel.

3. In a transom-lifter, in combination, a worm and means for turning it, a shaft having a Worm-wheel in mesh with the worm, and having at its extremity a transom-operating lever, adapted to be adjustably positioned variably radially from the axis of the shaft, and means for confining said lever in its given adjusted position.

4. In a transom-lifter, the combination of the Worm, and means for turning it, the shaft having the worm-wheel and having its extremity formed with a shouldered portion, and a squared portion, means for rotating the worm, a lever fitted against the shouldered extremity of the worm-wheel shaft and adjustable about the axis thereof, and a member having a squared aperture engaged with the squared end portion of such shaft, having an arc-slotted portion adjoining the face of the lever, and a headed screw or bolt having its shank passed through the slot with a thread engagement into the lever.

5. In a transom-lifter, the fixture consisting of a back or base having an integral are or bridge shaped bracket-section, and a separable arch-shaped bracket-section, the back and one bracket-section having journal-holes 10 10 in alinement perpendicular to the back, and the integral and separable bracket-sections having the alined journal-holes 12 12 parallel with the face of said back, and means for confining said bracket-sections together, the shaft, having the worm, journaled in the said apertures 10 10, and the shaft having the worm-wheel, in mesh with the worm, and journaled through the said apertures 12 12, and having a transom-operating lever at its extremity, and means for turning the Wormshaft.

Signed by me at Springfield, Massachusetts, in presence of two subscribing witnesses.

HEMAN OSBORNE. Witnesses V. LnAHY, WVM. S. BnLLows. 

